FullCalendar - defaultView agendaWeek interval time


I have a calendar with the FullCalendar plugin . Is the type agendaWeek. I need to add one hour
at the final date of hours interval.The image is wrong, each interval should be: 8-9, 9-10, 10-11, etc

how can do it?

I’m using this property:slotLabelFormat:“H - H”,

Thanks. best regards